If you're a frugal shopper, this Turtleneck will fit the bill. It's a fail-safe choice, while not very costly. Another strong contender for your wardrobe is this Michael Stars Rollneck. While the price of this item is competitive, it will surely attract a lot of attention. You might also want to consider this 1 STATE Rollneck. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you're looking for something in between pricewise, you're in luck with this Diane von Furstenberg Turtleneck in stock and waiting for you. You are guaranteed to fall in love with this item.